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Some chateaux are already putting up the price of their 2016 vintage, to compensate for an expected fall in revenue next year.

"We have a hangover. 80% of our vineyard was hit by the frost. It's all our work that has been wiped out," said Jean-Francois Galhaud, president of the Saint-Emilion Wine Council that represents nearly 1,000 winegrowers.

"It's a desolate scene. The vines seem beautiful but when you approach them you can see that everything is dead. There is no more fruit."

French winemakers aren't the only ones affected. Vineyards in Germany, Italy and the UK were also hit by the April cold snap.